Improvement in machines for tenoning spokes



1. R. COLEMAN el s. MYERS.

Machine forl Tenunng Spokes. N0. wil-718, Patented .\une22,1875` Fay. 7

UNITED SfrA'rns JOSHUA It. COLEMAN AND SAMUEL MYERS, OF GALION, OHIOlIMPROVEMENT IN MACHINES FOR TENONING SAPOKES.

Speciication forming part of Letters Patent No. lll, dated June 22,1875; application filed March l, 1875.

To all whom it may concern:

Beit known that we, JosHUA R. COLEMAN and SAMUEL MYERS, of Galion, inthe county of Crawford and State of Ohio, have invented an Improvementin Machines for Tenonin g Spokes, of which the following is aspeciiication:

In the accompanying drawing, Figure l represents a sectional sideelevation of our iniproved spoketenoning machine; Fig. 2, a perspectiveview of the cutter-head detached 5 Fig. 3, a vertical transverse sectionof the spoke-clamping device, taken on the line c c, Fig. l; and Fig. 4,detail perspective views of the adjustable cutting-knives.

Similar letters of reference indicate corresponding parts.

In our improved machine the spoke is accurately centered in relation tothe cutter-head by means of angular clampin g-plates operated by rightand left screw-threaded shafts. The jaws of the cutter-head have angularfaces, which bear upon the tenon, whatever be its form or size, at fourdifferent points, thereby supporting and steadying it under the actionofthe cutters. The crank-shaft, which rotates the cutter-head, works inthe tubular stem of lthe cutter-head, anda burr or screw-collardetermines their relative adjustment, and there- .l angular lengthwisechannel in its inner side,

so that when the plates are clamped upon a spoke they will have cach twopoints ot' contact with the spoke, whereas in other machines of thisclass there is but one point of contact. The plates B B' are likewisecaused to advance toward or recede from each other in equal degree. Theresult of this construction and arrangement of the plates B B is thatthe spokes are severally clamped more firmly, and more Yaccuratelycentered with relation to the cutter-head than in other machines, whoseclamping-plates have inner faces which are sections of an oval or anellipse, and but one of which is movable. lllleshing spur-gears f1 arekeyed on the heads of shafts e, and one of the latter is operated by acrank. The auger or cutter-head C, that tenons the ends of the spokesafter the machine has been fastened, as described, slides by a hollowstem, D, in the tubular guide part c of main frame A. The stem D is fedforward and backward by an internal scrcwthread fitting on the threadedshaft D1 of main crank-lever D2. Stem D is cast or otherwise providedwith extension arms or lugs f at opposite sides, which are slotted toallow the adjustment of the cutterjaws E. Jaws E are shown inperspective view in Fig. 2, the cutting-knives ij being attached in anadjustable manner to the guide` recesses and slotted bearings g1 of thesame, and iirmly set in the required position by clamp-screws f2. rlheinner faces of the jaws E have an angular forni corresponding toclamping-plates B Bf; hence the spoke-tenon is held steady under theaction of the cutters, there being four points of contact between it andthe jaws E instead of two, as in other machines. Stem D has also twostrong project ing parts,f1, which extend at nearly a right angle to thearms f, and serve to furnish the support to the jaws E, being set to anysize of tenon by means of right-andleft screw-bolts f2. The double boltsf2 are rmly secured after adjustment by a set-screw, f3, applied to thesame through the parts f1. The cuttingknife g3 is made with a straightplain edge, while the other, g4, is made with a similar edge, and, inaddition thereto, with a projecting lip, which dresses the tenon evenly,as shown in Fig. 4.

The length of the tenon is regulated by the adjusting burr or collar t',that is set on the crank shaft D1. The turning of the main crankproduces the forward feeding of the cutter-head on the spoke until thecollar t' comes in contact with the stein D, the check given by thecollar when the full length of the tenon is reached producing a perfectshoulder on the spoke. The machine is rapidly applied to the spoke andthe tenon cut, then taken oft' and placed on the next spoke, and so on,tenoning thereby in accurate manner all the spokes of the Wheel withouthandling the same, or changiugits position on the Wheelstool, so as toform a valuable substitute for the present tenoning implements andtools.

We are aware it is not new to employ angular plates for clamping spokesand hubs While being tenoned or mortised; and we do not claim suchmechanism, broadly. p

Having thus described our invention, we claim as new and desire tosecure by Letters Patentl. In the tenoning-machine herein described, thecombination, with the tubular guide-stock a, of screw-threadcd shaft D1,the tubular stem D, carrying cutter-head G, and threaded internally, asspecified, and the burr i, adjustable on the threaded portion of saidshaft, all constructed and arranged as shown and described, whereby theparts D1. and D are vlocked together during the operation of cutting thetenon, and the length of the latter is determined by their relativeadjustment, as set forth. I

2. In the improved tenoniug-machine herein described, the angularclamping-plates B B, right-and-left screw-shafts e e, and meshing-gearsf1, in combination with the angular jaws E E, bolts f2, tubular stem D,screwshaft D1, and burr i, all constructed and arranged to operate asshown and described, whereby the clamping and cutting mechanisms arecoincidently adjustable in the frame A, as and for the purposespecified.

JOSHUA R. COLEMAN.

SAMUEL MYERS. Witnesses:

J. G. MENsER,

WILLIAM HEIL.

